pi-4QPSK

PMA规约模拟测试软件。适合初学者使用，包含几个常用规约(PMA Statute of the simulation test software)

残疾人代码，手机定位，一键呼救应用程序，对残疾人的生活起到了很大的作用(Disabled code, mobile positioning, a key application for help)

用MATLAB产生线性跳频信号，中心频率和带宽可调(Using MATLAB to generate linear frequency hopping signal with adjustable center frequency and bandwidth)

（1）请推导出单径瑞利信道中的BPSK相干解调的理论误码率性能，并画出比特信噪比与误码率的关系曲线。 （2）在单径瑞利信道中，请设计一种时分的导引辅助的信道估计方法，用Simulink进行仿真，测量BPSK的误码率性能，画出比特信噪比与误码率的关系曲线，并与(1)的曲线进行对比。 ((1) derived from single-Path Rayleigh channel coherent demodulation of BPSK theoretical bit error rate performance and draw-bit signal to noise ratio and bit error rate curve. (2) in a single Path Rayleigh channel, please design a guided night-assisted channel estimation methods, using Simulink simulation, surveying BPSK BER performance, drawn-bit signal to noise ratio and bit error rate curve, and with (1) comparing the curve.)

说明：  简化实频技术，用于微波器件的宽带匹配的Matlab程序。(Simplified Real Frequency Technology)

这是一个关于gmsk和msk性能分析比较的源程序，能很好的实现GMSK频谱和功率谱。(this a matlab program about gmsk and msk s dpinpu and gonglvpu.)

说明：  最基础的检测概率；虚警概率；漏检概率与门限的关系。(Energy detection;Single threshold.)

建立无线传感网中节点路由的减少重传次数的一种算法(An algorithm to establish the number of node routing in wireless sensor networks to reduce retransmission)

说明：  基于matlab产生光正交码，里面有几种码，象光正交码等。(Based on MATLAB to generate optical orthogonal code, there are several codes, such as optical orthogonal code.)

matlab中离散信号小数点时延的实现算法,可以精确实现一段序列的延时(numerical time-delay)